Production Scheduling (PS) - how to 'persist' custom attribute creation inside the Model Workspace

Hello community:

When we create custom setup attributes in the PS Model work space, and assign to items and resources, how to we keep that custom setup resident or 'persist' in the PS model coming down from VCP Server and VCP solye?

Is this possible at all and how do you do it?  We've seen our custom attributes getting overwritten from VCP PS launch and solve?

This is something our team hasn't been able to figure out as we're doing setup pilot for a client.   We've seen the 'Enforce Horizon Start' checkbox to keep data maintained in the workspace, but things we setup as changeover outside of EBS BOM/WIP, how do we keep them in the same PS plan between VCP and PS?   Any and all answers are welcome.